The answer would be B because it was the beginning of the Napolenic Wars and the fall of the Bastille.
Because they are important to the American people and symbolize America in a whole
In 1803 Robert Livingston and James Monroe were sent to France to negotiate the purchase of the Louisiana Purchase. Originally the two met set out only to purchase New Orleans and the surround territory, however, by the end they eventually purchased the massive track of land that extended beyond the Mississippi River which greatly expanded the size of the United States.
For the American people to pursue their dreams. Also it was a chance for America to gain its own culture and own look apart from England
Voters were still very divided on the issue of slavery. They voted for Zachary Taylor, a presidential candidate who likely supported slavery, yet they also voted for many Free-Soil candidates who opposed slavery in the new territories.